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powerpc: Add PPC_NOP_INSTR, a hash define for the preferred nop instruction

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A bunch of code has hard-coded the value for a "nop" instruction, it
would be nice to have a #define for it.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Ellerman
2008-06-24 11:32:35 +10:00
committed by Paul Mackerras
parent ae0dc73625
commit b7bcda631e
4 changed files with 7 additions and 3 deletions
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3
arch/powerpc/kernel/cputable.c
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@@ -17,6 +17,7 @@
#include <linux/module.h>
#include <asm/oprofile_impl.h>
#include <asm/code-patching.h>
#include <asm/cputable.h>
#include <asm/prom.h> /* for PTRRELOC on ARCH=ppc */
@@ -1663,7 +1664,7 @@ void do_feature_fixups(unsigned long value, void *fixup_start, void *fixup_end)
pend = ((unsigned int *)fcur) + (fcur->end_off / 4);
for (p = pstart; p < pend; p++) {
*p = 0x60000000u;
*p = PPC_NOP_INSTR;
asm volatile ("dcbst 0, %0" : : "r" (p));
}
asm volatile ("sync" : : : "memory");